Methods in Psychological Research introduces students to the rich world of research in psychology through student-friendly writing, compelling real-world examples, and frequent opportunities for practice. Using a relaxed yet supportive tone that eases student anxiety, the authors present a mixture of conceptual and practical discussions, and spark reader interest in research by covering meaningful topics that resonate with today’s students. In-text features like Conceptual Exercises, FYI sections, and FAQ sections with accompanying visual cues support learning throughout the research experience. The Fourth Edition equips students with the tools they need to understand research concepts, conduct their own experiments, and present their findings.

Experimental Design : Dependent-Groups and Mixed Designs

Experimental Design : Dependent-Groups and Mixed Designs

Objectives

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After studying this chapter, students should be able to

  • Describe the difference between the two dependent groups designs (matched-groups and within-participants) and discuss three methods to control carryover effects
  • Propose a study suitable for a dependent groups design
  • Propose a study suitable for a mixed design

In Chapter 7, we discussed independent-groups designs, where participant differences are controlled by independently assigning participants to each group. Another way to handle participant differences between groups is to use a dependent-groups design. Often researchers use a combination of independent and dependent groups. Such designs are called mixed designs.

Consider the following questions:

  • Do women feel safer after they have taken self-defense classes?
  • How do married couples evaluate their satisfaction with their relationship after the first, third, fifth, ...
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